package com.qd.panda.service.shop.product;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.panda.domain.entity.shop.product.ProductImgDTO;
import com.qd.panda.mapper.shop.product.ProductImgMapper;
import com.qd.panda.model.ProductImg;
import com.qd.system.util.FileConfirmUtil;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.*;

import static java.util.stream.Collectors.toList;
import static java.util.stream.Collectors.toSet;

/**
 * 商品图片
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class ProductImgService extends BaseService<ProductImgMapper, ProductImg> {

    private static final String PREFIX_ID = "panda_product_img_id_{0}";
    private static final String PREFIX_LIST = "panda_product_img_productCode_{0}";

    private final RedisTemplateUtil<ProductImg> redisTemplateUtil;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */

    @Transactional(rollbackFor = Exception.class)
    public ProductImgDTO save(ProductImgDTO dto) {
        final ProductImg model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */

    @Transactional(rollbackFor = Exception.class)
    public ProductImgDTO update(ProductImgDTO dto) {
        final ProductImg historyModel = Optional.ofNullable(getById(dto.getId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final ProductImg model = dtoToModel(dto);
        try {
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */

    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<ProductImg> mList) {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */

    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<ProductImg> mList) {
        final List<String> ids = mList.stream().map(ProductImg::getId).collect(toList());
        final List<ProductImg> historyModelList = checkIds(ids);
        try {
            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }
    }

    /**
     * 删除，单个
     *
     * @param id 主键
     */

    @Transactional(rollbackFor = Exception.class)
    public void removeById(String id) {
        final ProductImg historyModel = Optional.ofNullable(getById(id)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(id)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */

    @Transactional(rollbackFor = Exception.class)
    public void removeBatchIds(List<String> ids) {
        final List<ProductImg> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */

    @Transactional(readOnly = true)
    public Boolean isExists(ProductImgDTO dto) {
        final QueryWrapper<ProductImg> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param id 主键
     * @return 存在为true
     */

    @Transactional(readOnly = true)
    public Boolean isExistsById(String id) {
        boolean exists = false;
        if (StringUtils.hasLength(id)) {
            final ProductImg model = getById(id);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param id 主键
     * @return 单条记录
     */

    @Transactional(readOnly = true)
    public ProductImg getById(String id) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, id);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(id), ProductImg.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param id 主键
     * @return 单条记录，转换成页面对象
     */

    @Transactional(readOnly = true)
    public ProductImgDTO getByIdDto(String id) {
        return Optional.ofNullable(getById(id)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */

    @Transactional(readOnly = true)
    public ProductImg getOne(ProductImgDTO dto) {
        final QueryWrapper<ProductImg> queryWrapper = createQueryWrapper(dto);
        ProductImg model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */

    @Transactional(readOnly = true)
    public ProductImgDTO getOneDto(ProductImgDTO dto) {
        return Optional.ofNullable(getOne(dto)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */

    @Transactional(readOnly = true)
    public List<ProductImg> getList(ProductImgDTO dto) {
        final QueryWrapper<ProductImg> queryWrapper = createQueryWrapper(dto);
        final List<ProductImg> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */

    @Transactional(readOnly = true)
    public List<ProductImgDTO> getListDto(ProductImgDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */

    @Transactional(readOnly = true)
    public IPage<ProductImgDTO> page(Page<ProductImg> page, ProductImgDTO dto) {
        final QueryWrapper<ProductImg> queryWrapper = createQueryWrapper(dto);
        Page<ProductImg> iPage = baseMapper.selectPage(page, queryWrapper);
        Optional.ofNullable(iPage.getRecords()).ifPresent(this::modelToDtoList);
        queryWrapper.clear();
        return iPage.convert(this::modelToDto);
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */

    public void clearCache(ProductImg model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getId()));
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_LIST, model.getProductCode()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */

    public void clearCaches(List<ProductImg> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }

        Set<String> productCodeSet = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_LIST, model.getProductCode())).collect(toSet());
        if (!productCodeSet.isEmpty()) {
            redisTemplateUtil.deleteByKey(productCodeSet);
            productCodeSet.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */

    public ProductImgDTO modelToDto(ProductImg model) {
        if (null == model) {
            return null;
        }
        final ProductImgDTO dto = new ProductImgDTO();
        dto.setId(model.getId());
        dto.setPicName(model.getPicName());
        dto.setPicPath(model.getPicPath());
        dto.setIdx(model.getIdx());
        dto.setProductCode(model.getProductCode());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */

    public ProductImg dtoToModel(ProductImgDTO dto) {
        if (null == dto) {
            return null;
        }
        final ProductImg model = new ProductImg();
        model.setId(dto.getId());
        model.setPicName(dto.getPicName());
        model.setPicPath(dto.getPicPath());
        model.setIdx(dto.getIdx());
        model.setProductCode(dto.getProductCode());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(ProductImgDTO dto) {
        dto.setPicPath(FileConfirmUtil.getFilePath(dto.getPicPath(), dto.getPicName()));
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */

    public List<ProductImgDTO> modelToDtoList(List<ProductImg> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */

    public List<ProductImg> dtoToModelList(List<ProductImgDTO> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<ProductImg> createQueryWrapper(ProductImgDTO dto) {
        final QueryWrapper<ProductImg> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(dto.getPicName())) {
                queryWrapper.eq("pic_name", dto.getPicName());
            }
            if (StringUtils.hasLength(dto.getPicPath())) {
                queryWrapper.eq("pic_path", dto.getPicPath());
            }
            if (StringUtils.hasLength(dto.getProductCode())) {
                queryWrapper.eq("product_code", dto.getProductCode());
            }
        }
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */

    public List<ProductImg> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<ProductImg> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(ProductImg::getId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    @Transactional(readOnly = true)
    public List<ProductImgDTO> getListByProductCodeDto(String productCode) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_LIST, productCode);
        List<ProductImg> l = redisTemplateUtil.getList(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY * 7), () -> {
            QueryWrapper<ProductImg> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("product_code", productCode);
            queryWrapper.orderByAsc("idx");
            List<ProductImg> list = super.list(queryWrapper);
            queryWrapper.clear();
            return list;
        }, ProductImg.class);
        return modelToDtoList(l);
    }
}